Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Elkem Silicones France Sas

Elken Silicones France Sas

Magali Bousquié

Sébastien Marrot

Vincent Monteil

Delphine Crozet

Jean Raynaud

Antoine Baceiredo

Tsuyoshi Kato

Yanli Mao

Juliette Berthe

The present invention concerns a method for the hydrosilylation of an unsaturated compound comprising at least one ketone function, one aldehyde function, one alkene function and/or one alkyne function, with a compound comprising at least one hydrogen-silyl function implementing an organic catalyst of tri-coordinated germanium.

Method of hydrosilylation implementing an organic catalyst derived from germylene

The invention relates to a crosslinkable composition X, comprising: at least one organopolysiloxane compound A comprising, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms; at least one organohydrogenopolysiloxane compound B comprising, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atom; at least one catalyst C which is a complex corresponding to the following formula: [Fe(L1)2] in which: the symbol Fe represents iron at degree of oxidation II; the symbols L1, which may be identical or different, represent a ligand which is a &#x3b2;-dicarbonylato anion or the enolate anion of a &#x3b2;-dicarbonylated compound; optionally at least one adhesion promoter D; and optionally at least one charge E. The invention also relates to the use of the previously described catalyst C as silicone composition crosslinking catalyst, to a silicone composition crosslinking method, wherein it comprises heating the composition X to a temperature of between 70 and 200&#xb0; C., and to the resulting crosslinked silicone material Y.

Silicone composition crosslinking catalysts

The invention relates to a crosslinkable composition X, comprising: at least one organopolysiloxane compound A comprising, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms; at least one organohydrogenopolysiloxane compound B comprising, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atom; at least one catalyst C which is a complex corresponding to the following formula: [Co (L1)2] in which: the symbol Co represents cobalt at degree of oxidation II; the symbols L1, which may be identical or different, represent a ligand which is a &#x3b2;-dicarbonylato anion or the enolate anion of a &#x3b2;-dicarbonylated compound; optionally at least one adhesion promoter D; and optionally at least one filler E. The invention also relates to the use of the previously described catalyst C as silicone composition crosslinking catalyst, to a silicone composition crosslinking method, characterized in that it consists in heating the composition X to a temperature of between 70 and 200&#xb0; C., and to the resulting crosslinked silicone material Y.

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Lyons, France

Magali Bousquié